Siemens Sinamics G120 Series Parameter Manual page 130

Parameters
List of Parameters
Note: When using the setpoint source
• Analog Input
• USS
the setpoint frequency (in Hz) is cyclically calculated using
• a percentage value(e.g. for the analog input r0754)
• a hexadecimal value (e.g. for the USS r2018[1])
• and the reference frequency P2000.
If for example P1082 = 80 Hz, P2000 = 50 Hz and the analog input is parameterised with P0757 = 0 V, P0758 = 0
%, P0759 = 10 V, P0760 = 100 %, a setpoint frequency of 50 Hz will be applied at 10 V of the analog input.
Regeneration at rated frequncy is only possible, when the maximum frequency (p1082) is higher than the rated fre-
quency of the motor.
When Quick Commissioning is carried out P2000 is changed as follows: P2000 = P1082.
p1082[0...2] Max. frequency / Max. frequency
CU240S DP Access level: 1
CU240S DP-F
Quick comm. YES
CU240S PN
Can be changed: C, T
Min
0.00 [Hz]
Description: Sets maximum motor frequency [Hz] at which motor will run irrespective of the frequency setpoint.
The value set here is valid for both clockwise and anticlockwise rotation. Futhermore, the monitoring function |f_act|
>= P1082 (r0052 Bit10, see example below) is affected by this parameter.
Example:
p1082 - p2162
|f_act| ≥ p1082 (f_max)
Dependency: The maximum value of P1082 also depends on the nominal frequency: Max. P1082 = min(15*P0310, 650 Hz).
As consequence P1082 can be affected if P0310 is changed to a smaller value.
The maximum frequency and the pulse frequency depending on each other. The maximum frequency affects the
pulse frequency according to the following table.
f
max
Example:
If P1082 is set to 350 Hz a pulse frequency from at least 6 kHz is necessary. If P1800 is smaller than 6 kHz the
parameter is changed P1800 = 6 kHz.
The maximum output frequency of inverter can be exceeded if one of the following is active:
1-130
⏐ f_act ⏐
p1082
1
r0052
Bit 10
0
2 kHz
0 - 133.3 Hz 0 - 266.6 Hz
p1082
P-Group: Setpoints
Active: NO
Max
650.00 [Hz]
p1800
4 kHz 6 kHz
0 - 400 Hz
SINAMICS G120 Control Units CU240S, Edition 05/2007
Data type: Floating Point
Data set: DDS
Factory setting
50.00 [Hz]
8 - 16 kHz
0 - 650 Hz
© Siemens AG 2007 All Rights Reserved
t
t